Method for solving solid-insulator electrical aging life

A technology of solid insulation and insulation life, applied in the direction of measuring electricity, measuring electrical variables, and electrical digital data processing, etc., can solve problems such as troublesome, physical, and mathematical meanings that are not intuitive enough, and achieve the effect of simple methods and intuitive mathematical meanings

Active Publication Date: 2015-07-08
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0018] For the unknown constants N and A in formula (4), it is very troublesome to directly use the traditional ma...

Method used

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  • Method for solving solid-insulator electrical aging life
  • Method for solving solid-insulator electrical aging life
  • Method for solving solid-insulator electrical aging life

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Embodiment Construction

[0055] see figure 1 and figure 2 , the solution method embodiment of solid insulation electrical aging life of the present invention, comprises the following steps:

[0056] S1, the electrical aging life of solid insulation obeys the inverse power law, that is:

[0057] L=AE -N (1);

[0058] In the formula, E is the electric field strength or voltage applied to the insulation; L is the insulation life under E; N is a constant, called the electric field strength (voltage) withstand index of the insulating material; A is a constant. The N and A values ​​depend on the material properties and the specific distribution of the electric field (voltage) in the material.

[0059] can be obtained from the above formula

[0060] E. N L=A(2);

[0061] S2, Accelerated electrical aging test of solid insulation using step-by-step voltage boosting method

[0062] For different voltage U k and voltage hold time T k , the value of the following formula remains unchanged, tha...

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Abstract

The invention discloses a method for solving the solid-insulator electrical aging life. The method includes the steps of S1, assuming that the solid-insulator electrical aging life obeys the inverse power rules (1) and (2) (please see the specification); S2, carrying out a solid-insulator acceleration electrical aging test with a step-by-step boosting method, wherein as for different voltages Uk and voltage keeping times Tk, the value of the following equation (3) (please see the specification) keeps unchanged; when the material accelerated life test is carried out with the step-by-step boosting method, the Tks in the equation (3) are the same and are assumed to be T0s, and the equation (3) becomes the equation (4) (please the specification); when the test is carried out, the multiple different T0s are selected for testing, and testing of multiple samples is carried out under each T0; multiple sets of known T0s, multiple sets of known Tms, multiple sets of Uks and multiple sets of Ums are obtained after the test is completed; S3, processing the test data with the maximum likelihood method; S4, calculating the insulation life L of a solid insulator under E according to the equation (1) or the equation (2). The method is simple, convenient and rapid, and the physical sense and the mathematical sense are visual.

Description

technical field [0001] The invention relates to a method for solving the electrical aging life of solid insulation. Background technique [0002] Most of the data measured during the electrical aging life test of solid insulation are discrete data. Previous studies have proved that the electrical aging life of solid insulation obeys the inverse power law, namely: [0003] L=AE -N (1); [0004] In the formula, E is the electric field strength or voltage applied to the insulation; L is the insulation life under E; N is a constant, called the electric field strength (voltage) withstand index of the insulating material; A is a constant; N, A value Depends on the material properties and the specific distribution of the electric field (voltage) in the material. [0005] can be obtained from the above formula [0006] E. N L=A(2); [0007] That is to say, the value of A is equal to the product of the Nth power of the electric field strength (voltage) applied to the i...

Claims

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Application Information

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IPC IPC(8): G01R31/00G06F19/00
Inventor 周丹林春耀郑晓光陈剑光欧小波柯春俊马志钦程文锋魏新劳聂洪岩王永红
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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